Patents by Inventor Eric L. Unruh

Eric L. Unruh has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Balanced band-pass filter for radio receivers
    Patent number: 7521991
    Abstract: A filter includes an input and an output. First and second filter stages having respective stage inputs and stage outputs are connected in cascade between the input and the output. Each filter stage includes an amplifier having an amplifier input and an amplifier output and an inner feedback loop connecting the amplifier output to the amplifier input. An outer feedback loop connects the stage output of the second filter stage with the stage input of the first filter stage. The first and second filter stages and the outer feedback loop are arranged so that an s-space closed-loop transfer function of the filter includes two zeros and a single pole.
    Type: Grant
    Filed: November 14, 2005
    Date of Patent: April 21, 2009
    Assignee: SPG Ltd.
    Inventors: Ilan Saul Barak, Kobi Ben-Atar, Eric L Unruh
  • Methods and apparatus for alteration of terminal counts of phase-locked loops
    Patent number: 6597246
    Abstract: A phase-locked loop (PLL) includes a down counter having a detection circuit configured to determine when the counter reaches its terminal count. The down counter also includes a control line configured to alter the terminal count detected by the detection circuit by an off-set.
    Type: Grant
    Filed: May 14, 2001
    Date of Patent: July 22, 2003
    Assignee: DSP Group, Inc.
    Inventors: Eric L. Unruh, Scott G. Gibbons
  • Methods and apparatus for alteration of terminal counts of phase-locked loops
    Publication number: 20020167359
    Abstract: A phase-locked loop (PLL) includes a down counter having a detection circuit configured to determine when the counter reaches its terminal count. The down counter also includes a control line configured to alter the terminal count detected by the detection circuit by an off-set.
    Type: Application
    Filed: May 14, 2001
    Publication date: November 14, 2002
    Inventors: Eric L. Unruh, Scott G. Gibbons